The Thermoelectric Properties of Abundant Molecule Junctions by Using Molecule-Nanoparticle Assembled Structures
I-Chih Ni1*, Shien-Der Tzeng1
1Department of Physics, National Dong Hwa University, Hualien, Taiwan
* presenting author:I-CHIH Ni,
Assembled nanostructures consist of metal nanoparticles have many interesting properties and application depending on their surface-modified molecules. For instance, the strong impact of the molecule linkage on the tunneling resistance of nanoparticle films was observed and exponential increased with interparticle spacing s. Another, Yvonne Joseph et al.[1] also applied the molecule-nanoparticle assembled structures to vapor sensor, and found the response (R/R0) ratios of sensor for several analyze vapor were dependent on surface-modified molecules. IN recent years, the the thermoelectric properties of molecule had been measured by using scanning probe microscope methods. However, the high cost and inconvenient measurement method impeded development. In this report, we show a simple method to measure thermoelectric properties of abundant molecule junctions using molecule-nanoparticle assembled structures. Many kinds of molecules, such as the metal-protoporphyrin molecule (Heme, Hematin, Protoporphyrin IX, Cobaltic-Protoporphyrin) and alkanethiol (MUA, MOA, MHA, and MPA) were studied. The Seebeck coefficients and power factors of molecule-nanoparticle assembled structures were also showed at this report, future, these results would be applied to molecule-nanoparticle device studies.

[1] A. Z. Khosousi, P. E. Trudeau, Y. Suganuma, and A. A. Dhirani, PRL, 96, 156403 (2006)

Keywords: thermoelectric, assembled structures, abundant molecule junctions, metal-protoporphyrin and alkanethiol molecule